How to remove cold welded cover screw

hello how are you , i want to take you opinion how to solve this problem , i have old problem many implant screw cover loose , so i do a new technique for me and use torque to tie it , but when case come for second surgery stage i cannot remove the screw it look like cold welded that is 2 implant when of the cover screw stripped , the other one no i want your opinion how to remove them and i want to ask is screw retrieval kit will help me at that case , thanks in advance

Apply some cold on the cover screw until it shrink a little and unscrew it with hand driver

Nb : not always working

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